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For test, I installed again after removing ConTeXtLMTX folder. But it is same as before. I looked files in “/tex/texmf-osx-64/bin”. There are 5 files: context, context.lua, luametatex, mtxrun, mtxrun.lua. context and mtxrun are symbolic linked to luametatex. But luametatex is not executable, so I changed it using “chmod 755 luametatex”. I run “mtxrun —generate”, then it set variables as follows: % mtxrun --generate resolvers | resolving | variable 'SELFAUTOLOC' set to '/usr/local/texlive/2019/bin/x86_64-darwin' resolvers | resolving | variable 'SELFAUTODIR' set to '/usr/local/texlive/2019/bin' resolvers | resolving | variable 'SELFAUTOPARENT' set to '/usr/local/texlive/2019' resolvers | resolving | variable 'TEXMFCNF' set to '' resolvers | resolving | variable 'TEXMF' set to '' resolvers | resolving | variable 'TEXOS' set to 'bin' resolvers | resolving | ……. and do many things in the texlive/2019 folders. My question is that luametatex is distributed as an inexecutable form deliberately? Thank you for reading. Best regards, Dalyoung